1. Price shown is weighted average sale price. The sale transactions reported on this line ranged in price from $56.50 to $56.73. The reporting person hereby undertakes to provide upon request by the Commission staff, DTE Energy Company, or a security holder of DTE Energy Company, full information regarding the number of shares sold at each separate price.

2. Includes shares of DTE common stock acquired under the DTE Energy Company Savings and Stock Ownership Plan (the "Plan") as of a Plan statement dated as of May 25, 2012.

3. The option vested in three equal annual installments beginning on November 4, 2003.

4. The option vested in three equal annual installments beginning on February 27, 2004.

5. The option vests in three equal annual installments beginning on February 9, 2005.

Remarks:

/s/Patrick B. Carey, Attorney-in-Fact

05/30/2012

** Signature of Reporting Person

Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person,
see
Instruction
4
(b)(v).